package com.example.myapplication;

import android.os.Handler;
import android.os.Message;
import android.util.Log;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class MyTask implements Runnable{
    private static final String TAG = "MyTask";
    private Handler handler;
    public void setHandler(Handler handler){
        this.handler=handler;
    }
    @Override
    public void run() {
        Log.i(TAG, "run: Running......");
        //获得网络数据
        try {
            Thread.sleep(3000);
        }
        catch (InterruptedException e){
            e.printStackTrace();
        }
        List<String> retList=new ArrayList<String>();
        try {
            Document doc = Jsoup.connect("https://www.usd-cny.com/bankofchina.htm").get();
            String title=doc.title();
            Elements trs=doc.getElementsByTag("tr");
            for(Element tr:trs){
                Elements tds=tr.getElementsByTag("td");
                if(tds.size()>0){
                    String td1=tds.get(0).text();
                    String td2=tds.get(5).text();
                    Log.i(TAG, "run: "+td1+"==>"+td2);
                    retList.add(td1+"==>"+td2);
                }
            }
            Message msg=handler.obtainMessage(5,retList);
            handler.sendMessage(msg);//handler 可以理解为快递系统
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
